The possible graduation of the Cook Islands to developed status is a much more pressing issue than any possible bid for the country to join the United Nations, says New Zealand prime minister Jacinda Ardern.

The final day on Rarotonga for New Zealand prime minister Jacinda Ardern will see her visit Tereora College, meet with officials at the office of the Opposition, and take part in a panel discussion facilitated by parliament Speaker Niki Rattle.

Changes to the pension portability scheme, which will make it easier for qualifying Cook Islands to claim New Zealand superannuation, were announced by New Zealand prime minister Jacinda Ardern yesterday.